名词
中文翻译：主对角线
同义词：
['principal axis', 'principal line例句：1. The principal diagonal of the room runs from one wall to the other.（房间的主对角线从一面墙到另一面墙。）']
例句：
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1. The principal diagonal of the room runs from one wall to the other.
房间的主对角线从一面墙到另一面墙。
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2. The architect drew a diagram showing the principal diagonal of the building.
建筑师绘制了一张图，显示了建筑物的主对角线。
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3.The principal diagonal is where the two walls meet at right angles.
主对角线是两面墙相交成直角的地方。